Nozzle



June- 3, 1941. D P HUNTER NOZZLE Filed Oct. 28. 1939 Patented June 3,1941 UNITED STAT NOZZLE Application October 28, i939, Serial Nc. 303,785

Claims.

My invention has to do with nozzles and, more particularly, it relatesto nozzles within which a plurality oi liquid streams are intimatelyadmixed before being sprayed therefrom.

While my nozzle is of course suitable for various uses, I have found itparticularly eicient and suitable as the nozzleelement of a vehiclewashing unit, for instance, wherein a cleaning chemical solution isintimately admixed with water and air.

I am of course aware that other nozzle devices have been designed forsuch uses, but my observation has been that they possess certaininherent shortcomings which serious irnpair their efciency. Forinstance, they are not so designed as will positively preventcontamination of the main Water supply by the cleaning chemicals, whichusually takes place when a back pressure in the nozzle forces thechemical solution back into the Water supply. Another shortcoming isthat prior devi-ces do not efficiently admix the various liquids makingup the solution to be sprayed.

It is therefore among my objects to provide a device of this characterwhich will positively prevent contamination of the main Water supply bychemicals used in forming the spray solution.

It is another object to `provide a device wherein proper admixture andatomizing of the liquids are obtained.

Another object is to provide efficient means in such a device forcontrolling the amounts of elements admitted to the solution formingportion of the nozzle.

Another object is to provide a device which may be economicallymanufactured, which is easy` to disassemble and reassemble for cleaningpurposes and which is capable of long life.

Still further objects and corresponding accomplishments are inherent inmy invention and those, as well as the objects specifically set forthhereinabove, will become obvious from the following detailed descriptionof one preferred adaptation of the invention, for Which purpose I shallrefer to the accompanying drawing, in which:

Fig. 1 is a side View, partly in section and partyly in elevation,showing certain parts in one position;

Fig. 2 is a fragmentary sectional view showing said parts in anotherposition; and

Fig. 3 is a cross-section. on line 3-3 of Fig. 2.

Referring now to the drawing, I show a body 5 having a liquid inletchamber 6 at its forward end into which liquid under pressure is (ci.zee- 4140 i admitted through a hose or the like 'I connected to the bodyby an adapter 8. In this adaptation of my invention, I show chamber 6 asthe Water inlet chamber.

A second chamber it is also provided in the body forward of andseparated from chamber 6 by a wall li, which wall is provided with athreaded opening i2 in which is` threadedly mounted the inlet end of awater delivery tube i5. Opening into chamber l0, at an angle of about 45there isa passageway l5 controlled by a valve il oi conventional form,said valve being actuated by manually turning the hand wheel ila.Connected to passageway It by an adapter 8, I show a supply hose i9,whichrcarries at its interior and disposed longitudinally therein asmaller hose 2 l. A tube 23 is inserted in the end of hose 2i and thedischarge end of tube 23 forms a seat for a ball valve 22 which is urgedinto closing position against its seat by means of `a coil spring 25seating at` its other end against the end wall of a housing cup 25. Cup2t is fitted onto the outlet end of tube 23 and has fluid passingopenings 2l through `its end and side walls. In this example of myinvention, I pass a cleaning chemical, such as a liquid soap, throughhose 2l under suitable pressure to unseat ball valve 22 and bedischarged into hose la; and in the annular space 28 between theexterior of hose 2l and the interior Wall .of hose |53, I pass air undersuitable pressure, the air and cleaning solution entering chamber ittogether. The angle at which passage it. communicates with chamber l!)gives to the stream of air and chemical solution a swirling action.Chamber l` is curved in longitudinal section so that. the water enteringit under pressure is given a swirling movement as'it enters theinlet endof tube l5. 1 l

The outlet end of body 5 is provided With a threaded opening til toreceive the threaded inlet end of a tube 32. The previously describedtube I5 is of smaller diameter than tube 32 and is mountedlongitudinally therein to provide an annular passageway 33 between theexterior of tube I5 and the interiorof tube 32. The outlet end of tube32 is threaded at 35 to threadedly receive the inner end of the nozzleholding sleeve 3l, which has an enlarged and interiorly threaded end 33to receive the packing nut 39 and packing llt. The outlet end ofsleeve31 is interiorly threaded at i2 to threadedly `receive the nozzle outlettip 43, through Which there is a Venturi-shaped outlet opening `45 Theinner end l of the nozzle tip member is .of reduced diameter and over itone end of a relatively iine mesh, cone-shaped, atomizing screen 50 istted. A mixing chamber 48 is provided between the inner end of thenozzle tip member and the discharge end of tube I5.

The outlet end of tube l5 is beveled to provide a seat for a wateroutlet control plunger 5|. Plunger 5| is cone-shaped at 52 mediallybetween its ends and has a reduced diameter portion 53 at its outer endto receive one end of a coil spring 55, which spring seats at its otherend against the inner end of the outlet nozzle tip member. Spring 55 isdisposed within the cone 50 and the inner end of the screen fits into asocket provided by the annular flange 51 of plunger 5|. The inner end ofplunger 5| is formed :as a spider 6| (Fig. 3) which is slidably mountedin tube I5 and acts to hold the plunger 5| centered in the end of tubeI5.

From the foregoing description, it will be seen that the cleaningsolution, under pressure, enters through tube 2| from a supply sourcenot shown,

imparts to it a swirling motion and thence it moves along passageway 33to the outlet end of tube 32, where it is met by and admixed with thewater stream entering chamber 48 from tube I5.

Plunger 5I has a portion 5 Ia presenting a straight annular face towardsthe outlet end of tube I5, against which the liquid discharged throughtube V|5impinges to aid.- in moving plunger 5| off its seat against thepressure of spring 55 and against fluid pressure in chamber 48. Face5|al also further acts to break up the liquid emerging from tube I5. Thetapered face of plunger 5| directs the Water stream outwardly tointersect the air and cleaning solution entering chamber 48 from passage33. I'he air-water-cleaning solution mixture is then forced through thescreen 50, thus thoroughly atomizing it before it enters theVenturi-shaped outlet 45.

If the airand cleaning solution stream Yshould be under such pressure asmight tend to barok up in tube I 5 and into the water supply, suchaction is prevented by the plunger 5|,` against which such back pressurewould act and which is normally urged into seating position by thespring 55.

The tension on spring 55 may be varied by screwing or unscrewing sleeve3l onto or off tube 32, a fluid' tight seat being maintained betweentube 32 and sleeve 31 by the packing washer Ml. Such movement of thesleeve with respect to the tube also-serves to vary the size of chamber48. Y If'it is desired, after the cleaning solution is applied to thesurface being cleaned, to use the .water stream alone for rinsingpurposes, it is only necessary to manually close valve I'I to shut offthe air and cleaning solution from entering chamber Il). By virtue ofthe ball valve 22, the air stream is prevented from backing up into thecleaning solution line.

, While, in the foregoing, I have resorted to considerable detail oi`structure and association of parts in describing one particular exampleof my invention, I wish it to be understood that I have done so merelyto make my invention understood Cil and that I do not limit my inventionto such de On the contrary, my invention is only to:

1. A nozzle device comprising: a body having therein= a plurality ofconcentric passageways: communicating at their inlet ends with said re ispective fluid inlets, a check Valve in one of said' passagewaysincluding a cone-shaped plunger having its apex disposed towards theoutlet end of said passageway and adapted to seat against said outletend, a coil spring urging said valve into seating position, a mixturechamber in the body with which the outlet ends of said concen tricpassageways communicate, a restricted outlet in the body communicatingwith the chamber and a cone-shaped screen mounted longitudinally in thechamber between the outlet ends of said passageways and the inlet end ofsaid restricted outlet, said `screen housing said spring and* beingdisposed with its apex end towards the outlet ends of said passageways.

2. In a nozzle device for mixing and spraying a liquid solution, a bodyhaving therein a mixing chamber, a discharge outlet communicating withthe chamber and a plurality of iiuid passing lines discharging into thechamber, a valve means associated with the discharge end of one of saidlines and' adapted to be opened by fluid" pressure within said' line,said means including a tapered plunger in the discharge end of said lineand seating against its discharge end, and pressure means in the chamberfor urging said valve into seating position, said plunger presenting anannular impact surface towards the discharge end of said line againstwhich the fluid passing irom said line impinges, said impact surfacebeing perpendicular to the axis of the plunger.

3. A nozzle device comprising: a body having a plurality of, fluidinlets, concentric passageways in the body communicating at their inletends with said respective iiuidI inlets, a mixture cham.- ber in thebody with which the outlet ends of the concentric passagewayscommunicate, an outlet in the body communicating with the chamber, acone valve mounted in the outlet end of the inner- ,most of theconcentric passageways, a recess in the base endof said valve, a tubularscreen having its inner end seated in said recess and extendinglongitudinally of the mixture chamber towards the outlet, said screentapering from a Vrelatively reduced diameter at its inner end toarelatively larger diameter at its outer end whereby the fluid emergingfrom the outlet ends of the concentric passageways willstrike theexterior face of the tapered portion of the screen.

4. A nozzle device comprising a body having a pair of fluid inlets, anouter tube, an inner tube mounted longitudinally and concentrically inthe outer tube and terminating in a common plane therewith whereby toprovide a pair of concentric passageways communicating at theirrespective inlet ends with saidV respective fluid inlets, a sleevethreadedly mounted at its inner end on the discharge end of the outertube and having a larger internal diameter than that of said' outertube, a nozzle member in the outer end of the sleeve, said nozzle memberbeing spaced from the discharge ends of said tubes whereby to provide amixing chamber therebetween, and a cone valve in the discharge end ofthe inner tube, said valve having a base portion presenting aY baiiiesurface perpendicular to the longitudinal axis of the inner tube.

5. A nozzle device comprising a body having a pair of fluid inlets,anouter tube, an inner tube mounted longitudinally andi concentricallyin the outer tube and terminating in a common plane therewith whereby toprovide a pair of concentric passageways communicating at theirrespective inlet ends with said respective uid inlets, a sleevethreadedly mounted at its inner end on the discharge end of the outertube and having a larger internal diameter than that of said outer tube,a nozzle member in the outer end' of the 10

